diff --git a/CMakeLists.txt b/CMakeLists.txt
index 247dd002..f4e17b06 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,6 +32,27 @@ if (APPLE)
 	SET ( DEFAULT_OSX  ON )
 	SET ( DEFAULT_V4l2 OFF )
 else ()
+	if ( NOT DEFINED PLATFORM )
+		if ( "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "x86" )
+			SET( PLATFORM "x86")
+		elseif ( "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm" )
+			SET( PLATFORM "rpi")
+			EXEC_PROGRAM( "nproc" OUTPUT_VARIABLE SYSTEM_CPU_CORES )
+			FILE( READ /proc/cpuinfo SYSTEM_CPUINFO )
+			STRING ( TOLOWER "${SYSTEM_CPUINFO}" SYSTEM_CPUINFO )
+			if ( "${SYSTEM_CPUINFO}" MATCHES "amlogic" )
+				SET( PLATFORM "wetek" )
+			elseif( SYSTEM_CPU_CORES GREATER 1 AND "${SYSTEM_CPUINFO}" MATCHES "bcm" )
+				SET( PLATFORM "rpi-pwm" )
+			endif()
+		endif()
+		if ( PLATFORM )
+			message( STATUS "PLATFORM is not defined, evaluated platform: ${PLATFORM}")
+		else()
+			message( FATAL_ERROR "PLATFORM is not defined and could not be evaluated. Set -DPLATFORM=<rpi|pri-pwm|wetek|x86>")
+		endif()
+	endif()
+
 	if ( "${PLATFORM}" STREQUAL "rpi" )
 		SET ( DEFAULT_DISPMANX   ON )
 		SET ( DEFAULT_SPIDEV     ON )
diff --git a/libsrc/bonjour/CMakeLists.txt b/libsrc/bonjour/CMakeLists.txt
index 52a251d7..f3f70b95 100644
--- a/libsrc/bonjour/CMakeLists.txt
+++ b/libsrc/bonjour/CMakeLists.txt
@@ -45,7 +45,6 @@ if (USE_SHARED_AVAHI_LIBS)
 		avahi-client
 		avahi-common
 		avahi-core
-#		avahi-qt4
 		dbus-1)
 else()
 	target_link_libraries(bonjour
@@ -53,6 +52,5 @@ else()
 		libavahi-client.a
 		libavahi-common.a
 		libavahi-core.a
-#		libavahi-qt4.a
 		libdbus-1.a)
 endif()